Norbornene-Based Resin Molded Article and the Method of Production Thereof

Abstract

A norbornene-based resin molded article obtained by bulk polymerizing a norbornene-based monomer in a mold; wherein said norbornene-based resin molded article is characterized by comprising a hybrid filler obtained by high-speed mixing the two or more kinds of fillers in dry method. Preferably, said hybrid filler is obtained by high-speed mixing, at least a fibrous filler having 5 to 100 aspect ratio and a particulate filler having 1 to 2 aspect ratio, in dry method. The present invention provides the norbornene-based resin molded article superior in rigidity and dimensional stability; and the method of production thereof.

1 : A norbornene-based resin molded article obtainable by bulk polymerizing a norbornene-based monomer in a mold wherein said norbornene-based resin molded article is characterized by comprising a hybrid filler obtainable by high-speed mixing two or more kinds of fillers in dry method. 
   
   
       2 : The norbornene-based resin molded article according to  claim 1  wherein said hybrid filler is a filler obtainable by high-speed mixing at least a fibrous filler having an aspect ratio of 5 to 100 and a particulate filler having an aspect ratio of 1 to 2, in dry method. 
   
   
       3 : The norbornene-based resin molded article according to  claim 2  wherein said fibrous filler is a wollastonite. 
   
   
       4 : The norbornene-based resin molded article according to  claim 3  wherein said particulate filler is a calcium carbonate. 
   
   
       5 : The norbornene-based resin molded article according to  claim 4  wherein a ratio between said fibrous filler and said particulate filler is, in weight ratio, fibrous filler: particulate filler=95:5 to 50:50. 
   
   
       6 : The norbornene-based resin molded article according to  claim 1  wherein said hybrid filler is surface treated with a silane coupling agent and/or a titanate coupling agent. 
   
   
       7 : The norbornene-based resin molded article according to  claim 1  wherein said norbornene-based resin molded article is a complex molded article co-formed with a complex giving member. 
   
   
       8 : The norbornene-based resin molded article according to  claim 7  wherein a plating layer is formed on a surface of said norbornene-based resin molded article. 
   
   
       9 : The norbornene-based resin molded article according to  claim 8  wherein said plating layer comprises;
 a first plating layer formed on the surface of said norbornene-based resin molded article by chemical plating, and a second plating layer formed on the surface of said first plating layer by electroplating.   
   
   
       10 : A method of production of the norbornene-based resin molded article according to  claim 1  characterised by comprising the steps of,
 injecting a reaction mixture comprising said norbornene-based monomer, a metathesis catalyst and said hybrid filler into a mold, and conducting bulk polymerization in the mold.   
   
   
       11 : The method of production of the norbornene-based resin molded article according to  claim 10  wherein a complex giving member is placed inside said mold. 
   
   
       12 : The norbornene-based resin molded article according to  claim 2  wherein said particulate filler is a calcium carbonate. 
   
   
       13 : The norbornene-based resin molded article according to  claim 2  wherein a ratio between said fibrous filler and said particulate filler is, in weight ratio, fibrous filler particulate filler=95:5 to 50:50. 
   
   
       14 : The norbornene-based resin molded article according to  claim 1  wherein a plating layer is formed on a surface of said norbornene-based resin molded article. 
   
   
       15 : The norbornene-based resin molded article according to  claim 14  wherein said plating layer comprises;
 a first plating layer formed on the surface of said norbornene-based resin molded article by chemical plating, and a second plating layer formed on the surface of said first plating layer by electroplating.